/*
 * Copyright (c) 2012 Jonathan Tyers
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package uk.org.uplink.configproxy;

public enum Option {
	/**
	 * Marks a {@link ConfigValue} as required. If the key for the ConfigValue does not exist in the underlying configuration, or it does not have
	 * a value, an exception will be thrown when it is retrieved.
	 */
	REQUIRED,

	/**
	 * Changes the behaviour of getting a {@link ConfigValue} into a 'check exists' - the method will return true if the key for the ConfigValue
	 * exists in the configuration, regardless of its value and even if it has no value. The method must return a boolean if this option is used.
	 */
	CHECK_KEY_EXISTS,

	;
}
